diff --git a/src/lmic_config.h b/src/lmic_config.h
index ce31292e..c586846a 100644
--- a/src/lmic_config.h
+++ b/src/lmic_config.h
@@ -43,7 +43,7 @@
 // enable more verbose output. Make sure that printf is actually
 // configured (e.g. on AVR it is not by default), otherwise using it can
 // cause crashing.
-#define LMIC_DEBUG_LEVEL 1
+//#define LMIC_DEBUG_LEVEL 1
 
 // Enable this to allow using printf() to print to the given serial port
 // (or any other Print object). This can be easy for debugging. The